Strainer.



an s'rans I l .J I

. ANT @EFTQE.

EDWARD C. KELLY, JR., OF BOSTON, MASSACHUSETTS, ASSTGNOR TO KELLY SEPARATOR COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

STRAINER.

Specification of Letters Patent.

Patented J an. 18, 1916.

Application filed June 4, 1915. Serial No. 32,212.

T 0 all whom it may concern Be it known that I, EDWARD C. KELLY, J r., a citizen of the United States, and resident of Boston, in the county of Suifolk and State of Massachusetts, have invented new and useful Improvements in Strainers, of which the following is a specification.

My invention relates to strainers for liquid conduits, and is particularly designed for use in separator traps and the like.

In the drawing hereto annexed which illustrates my invention, there is shown in side elevation a strainer, the portion of the casing and conduit in which the strainer is placed being shown in section.

The conduit, indicated generally by F, has an upwardly extending passage H in which the strainer I slides as occasion demands. The strainer I consists of a perforate wall cylindrical in shape and this cylindrical perforate portion fits loosely in the upwardly extending conduit H. The head of the strainer I at I is an imperforate plate to which the strainer portion I is secured; this imperforate head is of larger diameter than the cylindrical strainer so that it presents a circumferential flange, and this flange is adapted to seat after the manner of a check Valve at the seat J formed in the casing. For convenience in manipulation, the strainer is provided on its head with a bail I which can be reached through the opening which is normally closed by the clean out plug L. The normal course of liquids through the casing represented by F is from the inlet opening G to the final out let K. When liquid demands passage through this conduit and the strainer, the liquid pressure on the under side of the imperforate head I lifts the strainer, exposing as many perforations as are necessary to afford outlet for the liquid. The strainer automatically adapts itself to the demands made upon it rising to a greater or less extent according to the greater or less demand of liquid for passage. If, moreover, the strainer perforations become partially filled or clogged with sediment, grease or the like, the strainer will compensate for such constrictions by a greater lift than would be the case if the perforations were free from constricting sediment. Each time the flow of liquids ceases and the strainer drops to its seat the slight jar occasioned by the seating of the imperforate head I upon the seat J will tend to dislodge sediment temporarily adhering to the strainer. In case of back flow at the final outlet K, the check valve action of the imperforate head I will prevent the back flow from passing into the passage H and normally into G. In describing the strainer I as cylindrical, I use the term as generally descriptive of any shape, be it truly cylindrical or polyhedral, which is adapted to slide longitudinally in a similarly shaped conduit.

I claim:

A combination strainer and check valve for liquid conduits, comprising a laterally perforated cylindrical strainer adapted to slide in a similarl shaped section of the conduit, an imperforate head secured to said strainer having a circumferential flange coacting with a seat in said conduit, and said conduit provided with a slideway section for the strainer and a seat for the imperforate head thereof.

Signed by me at Boston, Massachusetts, this 1st day of June, 1915.

EDWVARD C. KELLY, J R.

Witnesses:

CHARLES F. WOODBERRY, RICHARD WV. HALL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

